Don't supply value for boolean attribute

Don't supply value for boolean attribute

According to the documentation, "If the attribute is Boolean, do not
supply a value because its presence in the attributes array implies a
true value." kCGLPFAAllowOfflineRenderers is a Boolean attribute, so
adding a value would make it interpret that value as another attribute.

BUG=

Committed: https://crrev.com/5af45da16e3d03aeb1482ab6d5234b67337bc9f1
Cr-Commit-Position: refs/heads/master@{#309807}

[Arjan van Leeuwen, 2014-12-30 08:58:30]

arjanl@opera.com changed reviewers:
+ tapted@chromium.org

[Arjan van Leeuwen, 2014-12-30 08:58:31]

Noticed a small mistake in this source code, something was added to the
attributes that shouldn't be.

[tapted, 2014-12-30 22:19:11]

tapted@chromium.org changed reviewers:
+ ccameron@chromium.org

[tapted, 2014-12-30 22:19:11]

You'll need ccameron for OWNERS (added), but lgtm

Looks like it's been this way for 11 months or so, since r249398 ->
crrev.com/131453012

[ccameron, 2014-12-30 23:05:58]

lgtm

[Arjan van Leeuwen, 2014-12-31 07:14:53]

The CQ bit was checked by arjanl@opera.com

[commit-bot: I haz the power, 2014-12-31 07:15:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/826353002/1

[commit-bot: I haz the power, 2014-12-31 08:12:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-31 08:13:14]

Patchset 1 (id:??) landed as
https://crrev.com/5af45da16e3d03aeb1482ab6d5234b67337bc9f1
Cr-Commit-Position: refs/heads/master@{#309807}